<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
    <div id="box">
        <div class="item">菜单一</div>
        <div class="item">菜单二</div>
        <div class="item">菜单三</div>
        <div class="item">菜单四</div>
    </div>

</body>
</html>